Switch for jump-spark ignition systems.



E. D. BRIGHT.

SWITCH FOR JUMP SPARK IGNITION SYSTEMS.

APPLICATION FILBDNOV.11,'1907.

Patented June 1,912.

3 SHEETSSHEET 1.

E. D. BRIGHT.

SWITCH FOR JUMP SPARK IGNITION SYSTEMS. APPLICATION FILED NOV. 11, 1907.

1,028,536;- I Patented June 4,1912.

3 SHBETSSHEET 2.

E. D. BRIGHT.

SWITCH FOR JUMP SPARK IGNITION SYSTEMS.

APPLICATION FILED NOV.11, 1907.

Patentd June 4, 1912.

3 BKBETS-8HEBT 3.

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EVAN D. BRlG-BT, @F PHIEADE I-FQ ITECTICUT TELEPZHQNE 4% E338 COENECTICUT, A CURPQEATEQE? ENSYLVANId, ASSIGNOB TO THE CON- ZIG SQL AN'ZZ', INCQRPOBATED, OF MERIDEN, E CQI-IHEC'TECUT.

. I SWITCH 5 GB JUEP-SFARE XGNITION SYSTEMS.

To all 'wleom z't may concern:

Be it known that I, EVAN l). BRIGHT, a citizen of the United States, residing at Philadelphia, county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Switches for Jump-Spark Ignition Systems, of which the following is a full, clear, and exact description. i

My invention relates to improvements in switch mechanism for circuits, particularly useful in connection with ignition circuits for gas engines. 1 y The object of the invention is to provide a safe and efi'ective mechanism of this kind for suchcircuits as include, for example, a battery circuit and a magneto circuit.

Many advantages will be apparent to the mechanic skilled in the art from a reading of the following specification.

In the. drawings, Figure 1 is a diagram matic view of two ignition circuits adapted to an engine of the internal combustion type, with my switch applied to both circuits. Fig. 2 is a front view relatively enlarged of the cover plate for the switch. Fig. 3 is a front View or" the switch, the cover plate be ing removed. Fig. 4: is a rear view of the switch. Fig. 5 is a vertical section on the line 0c-a2 of Fig. at, looking in the direction of the arrow. Fig. 6 is a cross section on the line y-y of Fig. 4, looking in the direction of the arrow. Fig. 7 is an elevation of the removable connector. Fig. 8 is a perspective view of a spring contact. Fig. 9 is a diagrammatic view of the magneto and switch circuits.

E represents the head of a four-cylinder engine. 7

T represents a timer for the battery circuit.

C represents a four-unit coil.

B represents a battery.

S represents the body of the switch.

M represents a magneto which is conventionally shown, and.represents amagneto of the well known high tension type adapted to jump-spark ignition systems, so-called and comprising primary and secondary windings grounded at m an interrupter m and a distributer m ln such magnetos, so long as the primary winding is shcrt-circuited, no. sparking will. oocur. .Ithe interruption of the primary cur- Specificatton of Itettcrs Patent.

Application filed November 11, 1907.

v Patented June 4, 1912. Serial no. 401,570.

rent induces a high tension current in the secondary winding,.as is well known, which, at the moment of breaking, produces a spark. In this particular instance 1,2, 3 and 1 represent spark plugs of the well known jump-spark variety. The secondary wires of the magneto, indicated at 1 3 and 4 lead to said plugs respectively. It

shouldbe understood that in ordinary pracv 'tice one end or. the primary winding of the magneto is per-man ntly grounded. The other'end of this-primary winding is indicated at 5. In the particular form of wiring shown herein this wire 5, (which will be referred to as the magneto shunt) leads to a terminal 19 of the switch.

B represents a battery.

6 is a wire leading therefrom to a terminal 7 of the switch.

8 is a switch terminal from which the wire 9 leads to the coil C. In this instance the coil C is of a type adapted to a four-cylinder engine and has outgoing high tension or secondary wires 26 27 528" 29 leading to the plugs 26, 27, 28 and 29. The wire 9 is suitably connected with the primary winding of the coil mechanism in the coil box 0.

101112 and 13 represent the ends of the primary windings of the several coil units in the coil C. These primary wires lead to a timer T of conventional well known form.

ld conventionally represents the ground terminal of the timer.

15 represents the from 14 to the switch terminal 16.

17 is another :switch terminal and 18 is a wire leading therefrom to battery 13.

is a switch blade mounted on terminal i 19 and arranged to swing thereon.

Thus far the parts described are seen in Fig. 1. The switch proper, indicated at S in Fig. 8, being on a small scale, is not shown in detail, but it should be assumed that, as shown, the rear side only is exposed.

Referring to the enlarged view of the switch shown in the other figures, it will be seen that the switch blade 20 may be swung to three different positions indicated on the front of the plate by the abbreviations Bat, Off. Mag. (Fig.2). When the switch blade 20 is swung to the position indicated by Bah, meaning battery, it rests upon the seat or studl's' representing ground wire leading the front end of the terminal 17 When the switch blade is in the position shown in Fig. 3, it rests on the front end 16* of the terminal 16, and when said switch blade is arranged under the abbreviation Mag, meaning magneto, it rests upon the stud or seat 46 at the front end of terminal 46.

being arranged to receive the removable plug or connector 22.

23 is a contact closer mounted upon terminal 8. YVhen the removable connector 22 is in, the circuit is made from 7 to 8 through wire 33, sleeve 21, plug 22 and circuit closer 23. 'lVh'en connector 22 is removed, the circuit closer assumes the position indicated in Figsl l and 5, engaging with contact 2 1, which, in this particular instance, is in electrical connection with terminal 19. 31-31 represent screw-holes by which the body of the switch may be secured to a suitable support.

30 is a rubber gasketat the rear edge of the switch body.

It will be understood that I have described only one preferred form of my invention, and that various systems of wiring may be resorted to without departing from the spirit of the invention.

In the particular form of the invention shown herein, the operation is as follows: Assuming the switch blade 20 is in the position indicated in Figs. 3, 4 and 6, and assuming the plug 22 is in, the primary coil battery circuit will be broken between contacts or terminals 17 and 19. While the switch is in this position, the primary winding of the magneto will be short-circuited or grounded through wire 5, terminal 19, blade 20, terminal 16 and wire 15 to ground 14.. Again, assuming the removable connector 22 is in place and the switch blade is moved to the position indicated in Fig. 1, the primary coil circuit will, be established with the battery B, the circuit being as follows: fr am battery 13, wire 6, terminal 7, wire 33, sleeve 21, connector 22, closer 23, terminal 8, wire 9: thence successively throughthe coil windings and wires 10.- 11, 12 and 13; thence through the circuit closer of the timer (conventionally shown at 14 to terminal 1 1, through wire 15 to terminal 16, through spring 25, plug 25, blade 20, terminal 17 and Wire 18 to battery. As bfore, the primary winding of the magn to will'be grounded as follows: through wire 5, terminal 19, blade 20, plug 25, spring 25,

of the timer.

lVhen the switch blade 20 is shifted to the opposite position from that indicated in Fig. 1 and in which it its electrically connected with the terminal 416, the battery circuit will be broken between 19 and 17, and the magneto shunt through wires 5 and 15 will also be broken, whereupon the magneto M will commence its action in the intended way and sparking will occur in the plugs 1, 2, 3 and 1 at times determined by the selfcontained circuit breaker or interrupter (not shown) for the primary winding of the magnehn The detailed construction of the magneto and the timer is not gone into because the particular construction of these devices constitute no essential part of this invention, so long as they are of the type referred to or adapted to this sort of ignition apparatus.

It will be observed that the primary coil circuit and the primary winding of the magneto overlap at the switch, and the arrangement is such that by this single means the primary coil battery circuit may be opened and closed without opening the magneto shunt or ground. Indeed, the arrangement is such that this circuit may be opened and closed without opening the magneto shunt circuit. It will be understood that the wire 15 operates as a ground in common to both the magneto M and the timer T.

From the foregoing it will be seen that the condition that obtains when the switch is off, provides a normally open primary coil circuitand a normally closed magneto shunt circuit. In other words, the primary coil circuit is the circuit extending from the v, source of energy B through the coils, and so on. This circuit 1s normally broken, or

open, and it requires a special act of thrawing the switch into the proper position to close it for use. As to the normally closed magneto shunt circuit, this means the circuit. through the wire 5, which normally serves to shunt the primary winding of the magneto so that sparking will not occur at the plugs 1 to 4 until this normally closed ma neto shunt circuit is broken.

In the particular arrangement herein shown, it will be observed that when the blade contact 20 is on contact i6 and the removable connector 22 is removed, the low tension primary current generated by the magnetowill pass through the coils, as willreadilybe seen by following the circuits. This will cause sparking to occur at plugs 26, 27, 28 and 29, in this case, the low ten sion current of the magneto being substituted for the battery current.

What I claim is,

1. In a jump spark ignition system, a normally open primary coil circuit leading from a battery, a normally closed shunt circuit leading from a high-tension magneto, a switch adapted to both of said circuits, both "of said circuits overlapping at said switch,

said switch when in one position being arranged to open the primary coil circuit and close said shunt circuit, and when in another position to close said primary coil circuit without opening said shunt circuit, and when in another position to open both of said circuits.

2-. In a jump spark ignition system, a normally open primary coil circuit leading from. a battery, a normally closed shunt circuit leading from a high-tension magneto, a switch adapted to both of said circuits, both of said circuits overlapping at said switch, said switch when in one position being arranged to open the primary coil circuit and EVAN D.- BRIGHT.

Witnesses:

R, O. MITCHELL, LANGDON MOORE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. Q. 

